Test Bank for Mosby's Respiratory Care Equipment 10th Edition by J.M. Cairo — 15 Chapters, 9780323416368

TESTBANK h




Mosby's Respiratory Care Equipment 1
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0th Edition by J. M. Cairo ISBN-
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13 9780323416368
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TESTBANK h

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,Chapter 01: Basic Physics for the Respiratory Therapist
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MULTIPLEhCHOICE

1. hPowerhishahmeasurehofhwhichhofhthehfollowing?
a. Mechanicalhenergy
b. Gravitationalhpotentialhenergy
c. Thehratehathwhichhworkhishbeinghperformed
d. Thehratehathwhichhatomshandhmoleculeshmove
ANS:h C
Powerhishahmeasurehofhthehratehathwhichhworkhishbeinghperformed.hThehformulahPh=hW/J,hwherehW
h=hwattshandh1hwatthishequalhtoh1hJ/s,hexpresseshthis.hJoulesharehthehinternationalhstandardhforhexpr

essinghenergyhandhwork.

PTS:h h 1 REF:h h Pageh8

2. Whenhefforthproduceshahchangehinhthehpositionhofhmatter:
a. workhishperformed.
b. ithishknownhashahjoule.
c. mechanicalhpowerhishcreated.
d. thehlawhofhthehconservationhofhenergyhishbeinghused.
ANS:h A
Workhishperformedhonlyhwhenhefforthorhoutsidehforceshproducehahchangehinhthehpositionhofhmatter.

PTS:h h 1 REF:h h Pageh8

3. Thehunithusedhtohexpresshthehforcehofh1hnewtonh(N)hactinghonhah1-
kilogramh(kg)hobjecthtohmovehith1hmeterh(m)hishwhichhofhthehfollowing?
a. Watt c. Kilowatt
b. Joule d.h h Kinetichenergy
ANS:h B
Onehjoulehishequalhtohthehforcehofh1hNhactinghonh1hkg.hAhwatthishequivalenthtoh1hJ/s.hAhkilowatthishsimpl
yh1000hW.hKinetichenergyhishenergyhanhobjecthpossesseshwhenhithishinhmotion.

PTS:h h 1 REF:h h Pageh8

4. Powerhishexpressedhinhwhichhofhthehfollowinghunits?
a. Newtons c. Ohms
b. Joules d.h h Watts
ANS:h D
Powerhishahmeasurehofhthehratehathwhichhworkhishbeinghperformed.hEnergyhandhworkharehmeasure
dhinhjoules.hOnehjoulehishthehforcehofh1hNhactinghonhah1-
kghobjecthtohmovehith1hm.hOhmshishthehresistancehanhelectricalhcircuithpossesses.

PTS:h h 1 REF:h h Pageh8

, 5. Fourhhorsepowerh(hp)hishequalhtohhowhmanyhkilowattsh(kW)?
a. 5.36 c. 2984
b. 2.98 d.h h 186.5
ANS:h B
1hhph=h0.746hkW.
1hhp/0.746h=h4hhp/X.
Xh=h4h h0.476h=h2.98hkW.

PTS:h h 1 REF:h h Pageh8

6. Thehenergyhthathanhobjecthpossesseshwhenhithishinhmotionhishcalled:
a. sound. c. thermal.
b. kinetic. d.h h potential.
ANS:h B
Kinetichenergyhishthehenergyhanhobjecthpossesseshwhenhithstayshinhmotion.hPotentialhenergyhishstor
edhenergy,handhithexistshinhmanyhformshsuchhashthermalhenergyhorhsoundhwaves.

PTS:h h 1 REF:h h Pageh9

7. Ifhthehvelocityhofhanhobjecthishreducedhbyhhalf,hitshkinetichenergyhwillhbehwhichhofhthehf
ollowing?
a. Reducedhtohoneheighth c. Reducedhtwofold
b. Increasedhtwofold d.h h Nothchanged
ANS:h A
Kinetichenergyh=h (masshofhobjecth squarehofhvelocityhithishtraveling,horhmv2)horhKEh=h (Vh
h



V).hIfhthehvelocityhishreducedhbyhhalf,hthenhKEh=h ( Vh h V),horh ( )h=h
h h reduction.

PTS:h h 1 REF:h h Pageh10

8. Energyhthathishstoredhinhanhobjecthishcalledhwhichhofhthehfollowing?
a. Kinetic c. Chemical
b. Potential d.h h Mechanical
ANS:h B
Energyhthathishstoredhorhpossessedhbyhanhobjecthbecausehofhitshpositionhishcalledhpotentialhenergy.
hMechanicalhenergyhcanhbehdividedhintoheitherhkinetichenergyhorhpotentialhenergy.hChemicalhpote

ntialhenergyhoftenhrefershtohthehbondshinhpetroleumhoilshthat,hifhbroken,hcanhbehconvertedhtohkineti
chenergy.

PTS:h h 1 REF:h h Pageh10

9. Thehpotentialhenergyhofhahcompressedhspringhishknownhashwhichhofhthehfollowing?
a. Gravitational c. Inelastic
b. Chemical d.h h Elastic
ANS:h D